As me and my cousin were exploring the outskirts of Yala National Park - Sri Lanka, we experienced something extraordinary: we got stuck in the centre of a war between the primates. Amidst the branches falling thunderously, deafening screeching and chattering, and a lot of commotion, the Tufted gray langur I captured was silently observing the pandemonium. When I managed to get closed to this langur, sensing my presence, it bared its teeth intimidatingly and expressed its hostility.